<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>

    <div id="root">
        <h2>人员列表</h2>
        <input type="text" v-model="keyWord" placeholder="请输入名字">
        <button @click="sortType=0">原顺序</button>
        <button @click="sortType=1">年龄升序</button>
        <button @click="sortType=2">年龄降序</button>
        <ul>
            <li v-for="(p,index) in filterPersons" v-bind:key="p.id">
                {{p.name}}-{{p.age}}
            </li>
        </ul>


    </div>
    <script type="text/javascript">
        const vm = new Vue({
            el: '#root',
            data: {
                keyWord: '',
                sortType: '0',//0原顺序，1升序，2降序
                persons: [
                    { id: '001', name: '马冬梅', age: '19' },
                    { id: '002', name: '周冬雨', age: '18' },
                    { id: '003', name: '周杰伦', age: '21' },
                    { id: '004', name: '温兆伦', age: '20' }
                ]
            },
            computed: {
                filterPersons() {
                    const arr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyWord) !== -1
                    })
                    if (this.sortType) {
                        arr.sort((p1, p2) => {
                            return this.sortType === 1 ? p1.age - p2.age : p2.age - p1.age;
                        })
                    }

                    return arr;
                }
            }
        })
    </script>


</body>

</html>